Cpk for Geometric Tolerance
Cpk for Geometric Tolerance
(OP)
Customer spec. calls for .005" T.I.R. on a round valve stem. Also customer wants a Cpk of 1.67. How can I calculate this? Should my target be set to zero? What should my upper and lower limits be? Am I missing something here?!?





RE: Cpk for Geometric Tolerance
Regards
RE: Cpk for Geometric Tolerance
I don't think you can get a Cpk value for TIR. My question should have been, "Is there a Quality measurment for TIR that is equivalent to Cpk?"
RE: Cpk for Geometric Tolerance
Regards
RE: Cpk for Geometric Tolerance
The company that I worked for at the time is long gone and I now find myself with the same problem again. I still cannot find suitable software for the single tailed distribution.
If anyone else has an answer, help is very much appreciated.
RE: Cpk for Geometric Tolerance
RE: Cpk for Geometric Tolerance
Thanks again.
Gary